Tacopants

Okay, can someone please explain to me the full story of Tacopants? I must have missed the day that this was originally announced here on mgoblog, but these are the things I know:

Jason Avant's imaginary friend (WTF?)

Apparently very tall because any time Henne fired a pass well over his target's head, the joke is that it was intended for the imaginary, gigantic, Tacopants.

I think the name Tacopants is one of my favorite things ever, so please help me understand. Did Jason Avant create this figure or is this a Brian creation and the two are merely associated because they're both "receivers"? Where did the name come from - is it because Michigan wears yellow pants and hard taco shells are yellow (if so, why not Mustardpants or anything else that is yellow?), or did it come from something else? Is there anything else I am missing to this story?

The FAQ sums up who Tacopants is, but we knew that already (and jdfogel pretty much described it in his post). But his question (and one I've wondered about for a long time as well) is, how exactly did this eleven foot tall receiver made of dreams get named Tacopants?

Edit: Well, I guess he did have other questions. But still, why the name?

I suggest going to Grizzly Peak Brewing Company in Ann Arbor. Since Keegan and I almost got booted for our "vulgar" sign this weekend, I have deemed them the official Tacopants Information Clearinghouse.